ASN Wikibase Occurrence # 355223
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| Date: | Monday 22 September 1997 |
| Time: | 09:33 LT |
| Type: |  Cessna A188B |
| Owner/operator: | Aduda & Sons |
| Registration: | N53172 |
| MSN: | 18801662T |
| Total airframe hrs: | 3067 hours |
| Engine model: | Continental IO-520-F |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Zellwood, FL -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | , FL (KPVT) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilot, a loss of engine power occurred, while he was applying insecticide to a farm. A force landing was made in a plowed field. During the landing, the airplane encountered a small ditch in soft terrain, and the airplane nosed over. Examination of the maintenance records revealed that a top overhaul of the engine had been accomplished, 7 days before the accident. Postaccident examination of the engine revealed a fractured crankshaft. Multiple origin sites of the fracture were found from the surface of the journal radius. There was evidence that inadequate torque had been applied to the crankcase through-bolts. The #2 main bearing had moved fore and aft in the bearing bore and had rotated in the crankcase; there was heavy fretting at the #2 and #3 main bearing boss parting surfaces; and there was evidence of severe pounding from lack of support that had started a breakup of the #2 bearing.
Probable Cause: failure of mechanics to adequately torque the crankcase through-bolts following a top overhaul, which subsequently resulted in a crankshaft failure. Soft/uneven terrain in the emergency landing area was a related factor.
Accident investigation:
 |
|
Sources:
NTSB ATL97LA136
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 12-Mar-2024 09:37 | ASN Update Bot | Added |
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